$\Delta\eta$-$\Delta\phi$ correlations and the ridge structure in STAR
Abstract
Triggered di-hadron correlation studies using central Au+Au collisions at = 200 GeV in STAR revealed a novel ridge-like structure in two dimensions (,) for high particles. A similar structure is also present in an inclusive un-triggered di-hadron correlation analysis. We study the <> evolution of di-hadron correlations by increasing the lower acceptance of both charged particles. A smooth evolution of data is observed and our results reproduce the triggered analysis structure near <p_{T}> = 2.7 GeV/c. We quantify the correlation structure evolution by fitting a model function. The model function emphasizes possible initial state fluctuation contributions via the use of higher harmonic model components (n=1,2,3,4,5) and a remainder which is modeled via an asymmetric 2d Gaussian. The extracted parameters are compared to model predictions and p+p data at = 200 GeV and possible origins of the nearside structure are discussed.
Cite
@article{arxiv.1209.4941,
title = {$\Delta\eta$-$\Delta\phi$ correlations and the ridge structure in STAR},
author = {L. Chanaka De Silva},
journal= {arXiv preprint arXiv:1209.4941},
year = {2015}
}
Comments
8 Pages, 7 Figures : Proceedings of the Winter Workshop in Nuclear Dynamics, Puerto Rico